TY  - JOUR
AU  - K. D. jr. Magill
TI  - Semigroups in which each      -class contains at most one regular ...-class.
JO  - Semigroup forum
PY  - 1977
SP  - 91
EP  - 92
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1977__15_134238/
ID  - SF_1977__15_134238
ER  -